Here we describe the columns for each of the source tables.
The burst table contains analysis results for every RXTE/PCA, BeppoSAX/WFC and INTEGRAL/JEM-X burst from 85 sources drawn from the source list, detected in the observations making up the observation table. As we list each detected event separately, and 28 bursts were detected by more than one instrument, the burst table includes 7111 entries. The sample of bursts that is queried via the web interface includes approximately 1600 additional events not provided in the ASCII tables; these include type-II events (from the Rapid Burster, observed with the RXTE/PCA), and events initially identified as burst candidates, but subsequently rejected due to the lack of evidence for cooling, or identification with other mechanisms. The selection criterion to retrieve only the events also found in the ASCII table is type=1.
| Web table | ASCII table | |||
|---|---|---|---|---|
| Column | attribute | Format | Units | Description |
| 1 | name | A23 | Likely burst origin | |
| 2 | instr | A3 | Instrument label | |
| 3 | obsid | A20 | Observation ID | |
| 4 | time | F11.5 | d | Burst start time (MJD UT) |
| 5 | entry | I4 | MINBAR burst ID | |
| 6 | entry_obs | I6 | MINBAR observation ID in which this burst falls | |
| 7 | bnum | I3 | Order of the event within the observation | |
| 8 | xref | I3 | Burst ID in external catalog (G08 or C17) | |
| 9 | mult | I1 | Number of MINBAR instruments which detected this event | |
| 10 | angle | F6.2 | arcmin | Angle between the source position and pointing axis |
| 11 | vigcorr | F5.3 | Vignetting correction factor | |
| 12 | sflag | A11 | Data quality/analysis flags | |
| 13 | rexp | A1 | Photospheric radius expansion flag | |
| 14 | rise | F5.2 | s | Rise time |
| 15 | tau | F5.1 | s | Ratio of fluence to peak flux, \tau=Eb/Fpeak |
| 16 | taue | F5.1 | s | Uncertainty on \tau |
| 17 | dur | F6.1 | s | Burst duration |
| 18 | dure | F6.1 | s | Uncertainty on burst duration |
| 19 | edt | F6.1 | s | Exponential decay timescale |
| 20 | edte | F7.3 | s | Uncertainty on exponential decay timescale |
| 21 | tdel | F8.1 | hr | Time since previous burst from this source |
| 22 | trec | F7.1 | hr | Inferred recurrence time Trec |
| 23 | perflx | F6.3 | 10-9 erg cm-2 s-1 | Persistent 3--25 keV flux prior to the burst, Fper |
| 24 | perflxe | F5.3 | 10-9 erg cm-2 s-1 | Uncertainty on persistent flux |
| 25 | alpha | F6.1 | Ratio of integrated persistent flux to burst fluence, \alpha | |
| 26 | alphae | F6.1 | Uncertainty on \alpha | |
| 27 | bc | F5.3 | Bolometric correction adopted for persistent flux | |
| 28 | bce | F5.3 | Uncertainty on bolometric correction | |
| 29 | gamma | F6.4 | Ratio of persistent flux to peak PRE burst flux, \gamma | |
| 30 | sc | F6.3 | Soft colour | |
| 31 | hc | F6.3 | Hard colour | |
| 32 | s_z | F6.3 | Position on colour-colour diagram, Sz | |
| 33 | pflux | F6.2 | count s-1 cm-2 | Peak photon flux |
| 34 | pfluxe | F5.2 | count s-1 cm-2 | Uncertainty on peak photon flux |
| 35 | fluen | F8.3 | count cm-2 | Integrated photon flux |
| 36 | fluene | F7.3 | count cm-2 | Uncertainty on integrated photon flux |
| 37 | bpflux | F6.2 | 10-9 erg cm-2 s-1 | Bolometric peak flux Fpeak |
| 38 | bpfluxe | F5.2 | 10-9 erg cm-2 s-1 | Uncertainty on bolometric peak flux |
| 39 | kT | F4.2 | keV | Blackbody temperature kT at burst peak |
| 40 | kTe | F4.2 | keV | Uncertainty on kT at burst peak |
| 41 | rad | F6.1 | km/10 kpc | Blackbody normalisation at burst peak |
| 42 | rade | F5.1 | km/10 kpc | Uncertainty on blackbody normalisation at burst peak |
| 43 | bfluen | F6.4 | 10-6 erg cm-2 | Bolometric fluence (integrated bolometric flux) Eb |
| 44 | bfluene | F6.4 | 10-6 erg cm-2 | Uncertainty on bolometric fluence |
| 45 | refs | A20 | References for the burst |
The complete list of observations from which the MINBAR sample was drawn (including non-detections) is only available via this web interface. The additional observations include those in which the target (or any other source in the FOV, in the case of RXTE/PCA) is not detected above our significance threshold; duplicate entries, added in error; and observations from sources in which bursts have not been detected by any of the instruments analysed here, earlier than the cutoff date. The selection criteria to retrieve only the events also found in the ASCII observations table is flag>=0,sig>=3.
| Web table | ASCII table | |||
|---|---|---|---|---|
| Column | attribute | Format | Units | Description |
| 1 | name | A23 | Source name | |
| 2 | instr | A6 | Instrument label | |
| 3 | obsid | A20 | Observation ID | |
| 4 | entry | I6 | MINBAR observation ID | |
| 5 | sflag | A3 | Data quality/analysis flags | |
| 6 | tstart | F11.5 | MJD | Observation start time |
| 7 | tstop | F11.5 | MJD | Observation stop time |
| 8 | exp | I6 | s | Total exposure |
| 9 | angle | F7.2 | arcmin | Off-axis angle |
| 10 | vigcorr | F5.3 | Vignetting correction factor | |
| 11 | nburst | I3 | Number of (type-I) bursts in the observation | |
| 12 | count | F8.3 | count cm-2 s-1 | Background-subtracted mean rate for target source |
| 13 | counte | F8.3 | count cm-2 s-1 | Uncertainty on mean rate |
| 14 | sig | F6.1 | Detection significance for this observation | |
| 15 | flux | F6.3 | 10-9 erg cm-2 s-1 | Mean flux over the observation |
| 16 | fluxe | F6.3 | 10-9 erg cm-2 s-1 | Estimated uncertainty on mean flux |
| 17 | gamma | F6.4 | \gamma ratio of persistent flux to mean peak flux of radius-expansion bursts | |
| 18 | sc | F6.3 | Soft colour | |
| 19 | hc | F6.3 | Hard colour | |
| 20 | s_z | F6.3 | Sz value, giving position in the colour-colour diagram | |
| 21 | model | A30 | Spectral model ({\sc XSpec} syntax) | |
| par1 | Spectral parameter 1; order in ASCII file varies | |||
| par1e | Error on spectral parameter 1 | |||
| par2 | Spectral parameter 2; order in ASCII file varies | |||
| par2e | Error on spectral parameter 2 | |||
| par3 | Spectral parameter 3; order in ASCII file varies | |||
| par3e | Error on spectral parameter 3 | |||
| par4 | Spectral parameter 4; order in ASCII file varies | |||
| par4e | Error on spectral parameter 4 | |||
| par5 | Spectral parameter 5; order in ASCII file varies | |||
| par5e | Error on spectral parameter 5 | |||
| par6 | Spectral parameter 6; order in ASCII file varies | |||
| par6e | Error on spectral parameter 6 | |||
| par7 | Spectral parameter 7; order in ASCII file varies | |||
| par7e | Error on spectral parameter 7 | |||
| par8 | Spectral parameter 8; order in ASCII file varies | |||
| par8e | Error on spectral parameter 8 | |||
| par9 | Spectral parameter 9; order in ASCII file varies | |||
| par9e | Error on spectral parameter 9 | |||
| 44 | chisqr | F5.2 | Mean reduced \chi^2 of spectral fits | |
| 45 | chisqre | F5.2 | Standard deviation of reduced \chi^2 from spectral fits, where more than one spectrum is fit |
We assembled a complete list of thermonuclear burst sources by first cross-matching the INTEGRAL source catalog (Bird et al. 2010; see also here) with the burst sources (source type code "B") in the catalog of LMXBs of Liu et al. (2007). To ensure completeness, we cross-matched our original list with a separate catalog, assembled following a systematic search through the literature and incorporating new discoveries since the mid 1990s (available here).
The resulting sample includes 113 known LMXBs which have exhibited type-I (thermonuclear) bursts. Selected columns in the FITS file which we also provide as part of the MINBAR sample are described below.
Note that the table displayed via the web interface includes three additional columns; the first, a link to the source at Simbad; the second, "bursts" links to a query for all the MINBAR bursts for that source; and the third, "obs" to all the observations.
| Web table | FITS table | |||
|---|---|---|---|---|
| Column | attribute | Format | Units | Description |
| 1 | NAME | A22 | Burster name | |
| 6 | Type | A7 | Source type, as for Table \ref{tab:bursters} | |
| 8 | RA_OBJ | E | deg | Source right ascension |
| 9 | DEC_OBJ | E | deg | Source declination |
| 10 | ERR_RAD | E | deg | Positional error |
| 16 | NH | E | 1022 cm-2 | Adopted neutral column density NH along the line of sight |
| 17 | NH_err | D | 1022 cm-2 | 1\sigma uncertainty on NH |
| 18 | NH_bibcode | A21 | Reference bibliographic code for NH value, providing a link to the publication on NASA's ADS | |
| 20 | COMMENTS | A132 | Aliases, host clusters, and other information | |
| 23 | Porb | D | h | Orbital period, where known |
| 24 | Porb_flag | A1 | A "?" indicating cases for which the orbital period is a candidate only | |
| 25 | Porb_bibcode | A21 | Bibliographic code for orbital period | |
| 57 | Vmag | E | mag | V-magnitude, where measured (from Liu et al. 2007) |
| 60 | nburst | I | Number of bursts in MINBAR | |
| 61 | nobs | I | Number of observations in MINBAR | |
| 62 | exp | E | ks | Total exposure |
| 63 | ERR_CONF | E | Confidence level for positional error | |
| 64 | pos_method | A20 | Method by which source position determined | |
| 65 | pos_bibcode | A21 | Reference for source position | |
| 67 | disc | A6 | Instrument and year of discovery of burst activity | |
| 68 | disc_bibcode | A19 | Reference bibliographic code for burst discovery | |
| 70 | rate | E | hr-1 | Burst rate (or limit) measured in the MINBAR sample |